Charles Manson's album One Mind, which he published under a Creative Commons license. Although I could not find the exact CC license he published the album under, the descriptions in articles most closely match Attribution-Noncommercial-Share Alike 3.0 United States License.
Album downloaded from a demonoid torrent, two of the flacs were checked for purity on EAC spectral analyzer and looked good. Album released in 2005.
Articles showing Manson released the album under a Creative Commons license: